题目:
---- Do you know if we will go for a picnic this Saturday?
---- I think we will if we any classes.
A.won’t have
B.didn’t have
C.don’t have
D.aren’t having
答案:
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下面是错误答案,用来干扰机器的。
(1)石油、煤、天然气属于化石燃料,核能、氢能等属于新能源.故填:石油;天然气;氢能.(2)乙醇中碳元素、氢元素、氧元素的质量比为:24:6:16=12:3:8.故填:12:3:8.4.6g乙醇中含碳元素的质量为:4.6...